Beading-machine



(N0 Model.)

0. M, ROHN. Beading Machine.

' Pate ntecl May 10, l88| C I E N PET ERS. Fhnmiithognpher. Washington. D. C.

UNITED STATES PATENT OFFICE. A

CHARLES M. ROHN, OF SPRINGFIELD, OHIO.

BEADlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 241,157, dated May 10, 1881.

Application filed February 12, 1881.

To all whom it may concern:

Be it known that I, CHARLES M. RoHN, of the city of Springfield, in the county of Clarke and State of Ohio, have invented a new and useful Improvement in Beading-Machines for Forming Cylindrical Beads on Sheet -Metal Gutter-Sections, of which the following is a specification.

My invention relates to that class of headin g-machines in which a forming-rod is used in connection with a groove in the opposite jaws of the headers for forming the head by a turn of the rod.

Heretofore in all beadin g-machines this forming-rod has its bearing throughout the entire length of the groove, and in consequence it is more difficult to operate from the excessive friction between the surface of the sheet on which the tube or bead is being formed and the interior surface of the groove in which the forming-rod is rotated. In these machines the formin g-rod, being without any special bearin gpoints to relieve it, is liable to become loose or twisted, and the sheet to fly out of its groove in turning the tubular bead upon it. Another disadvantage common to the machines at present in use for forming tubular beads upon the edges of sheets of tin for eavestroughs is that they are constructed of many parts, wheels, cams, eccentrics, levers, springs, and cogwheels making a part of almost every beadingmachine at present in use. The construction of these machines entails much cost, and their operation necessitates the use of oil, and the several contactin g surfaces produce excessive friction. In machines where cams or eccentrics are used to act upon depending lugs extending from the jaws the eccentrics are generally secured upon the shaft by a set-screw. In case one of these becomes loose, the pressure upon the sheet upon that point through the medium of the jaw being relieved it is liable to become twisted in forming the bead, which is only partially closed in some places. Besides these disadvantages such machines easily get out of repair. In all these beadingmachines the rod is removable.

In my machine the forming-rod is not removable endwise. It has no bearings, except at each end of the machine, and in order to strengthen it it is re-enforced by a heavy collar (No model.)

formed on it, which collar const-itutesits main bearin g or journal, near the crank end. This bearing rotates in a box, one-half of which is milled out of each jaw. This collar, thus incased in its box, prevents the rod from being moved endwise in either direction. The small end of the rod rotates in a box formed in the standard, through which it projects. The top of this standard is slotted down to this box to allow the sheet of tin to be inserted through it into the groove in the rod.

Figure 1 is a top view of my improved beading-machine. Fig. 2 is a side elevation of the same. Fig. 3 is avertical section through the crank end of the machine, enlarged. Fig. 4 is a cross-section of the machine through line 1 2, Fig. 2, enlarged. Fig. 5 is an end view of the box-bearin g, in which the small end of the forming-rod rotates in the top of the standard, at that end of the machine which is shown broken off from the body part.

The main portion of my machine consists of but three partsviz, a tubular shell, one-half of which isstationary and the other movable; a crank-shaft operating the latter inclosed within the tubular case or shell, and a formin g-rod, which has two end bearings only.

In the figures, A is the fixed half or leaf of the tubular case of my machine. A is the movable leaf. The part A is cast in a single piece with the standards a and a and the base a, which connects the latter. The movable leaf A is hinged to the stationary leaf above the inner periphery of the circle formed by the union of the two leaves or halves of the case at the top, just under the stops 0 c, and in close proximity to the forming-rod and its groove, and as the leaf A is large and extended to nearly a half-circle a powerful leverage can be obtained by the operation of the crank-shaft 0 upon its inner surface. As the jaws are pivoted close up under the former they are much stronger and more compact.

By reference to Figs. 3 and 4. the structure of the parts can be clearly seen.

B is the forming-rod having a large collarbearin g, I), which rotates in the box b, of which 0 is a slot cut down through the top of post a to allow of inserting the edge of the sheet of tin through it into the groove in the forming-rod.

c c are stops or projections between the forming-groove and the hinge. These prevent the jaws which inclose the former from pressing too much upon the sheet as the tube on its edge is being formed.

The rod. B is fitted in the groove f so as to leave about one thirty-second of an inch between it and the inner surface of the groove between the bearings b and e. In case extra thick sheets are used this space may be increased.

The movable leaf A being hinged near the top its own weight causes it to swing toward the central line, 3, as shown by the curved dotted lines, (see Fig. 4,) and thus open the jaws sufficiently to introduce the edge of the sheet and to relieve the pressure upon the bead when the force of crank-shaft O is removed.

In Fig. 4 the hand-lever c is shown attached to crank-shaft G on the crank end of the machine. I make my improved machines with this lever attached at either one of its ends.

In operating my machine the edge of the sheet is slipped through the slot 0 in the top of the post a down into the groovefof rod B, and passed along this groove until it reaches the collar-bearing Z). The crank-shaft O is now turned downward about one-sixth of a revolution by its handle 0, causing it to bear throughout its whole length upon the inner surface of leaf A, thus throwing it outward and closing the jaws till the stops 0 0 come in contact, when the machine is set ready to operate the former in turning the tube on the eaves-trough section or sheet. After the head is turned upon the edge of the sheet or section lever c is thrown up, releasing the pressure of the crank-shaft from leaf A, which then falls by its own gravity, opening the jaws sufiiciently to raise the crank end of the former-rod with its collar out of box I). It is then shifted slightly endwise to disengage its extreme end from its bearing in post a, and the sheet slipped off the rod in the usual manner and the rod returned to its place.

I am aware that forming grooves and rods in beading-machines is not new, and I do not claim them nor do I claim a cam-lever for operating a pair of movable jaws, as the same has been before used.

I claim as my improvement- 1. In beading-machines, the combination, with a box in the crank end of the jaws thereof, of a bearing-collar (fitting therein) on the former-rod for the purpose of retaining said rod in the groove and preventing endwise movement of the same, as hereinbefore set forth.

2. The combination, in a beading-machine, of a forming-groove having an enlarged cylindrical box, b, in a stationary jaw, A, and in a movable jaw, A, and stop-projections c c on the lower face of said jaws, under the forminggroove f, with a forming-rod, B, having an enlarged collar or journal, I), as and for the purpose specified.

3. In a beading-machine having a tubular case consisting of a fixed and a movable leaf, the combination, with the latter, of a crankshaft pivoted in such manner within said case as to operate upon the entire inner surface of said movable leaf throughout its length, substantially as specified.

4. The combination, in a beading-machine constructed as described, of a post or standard having a box or hearing therein in which the small or extreme end of the forming-rod is journ aled, and a slot out down through the top of said post to said box, central therewith, for introducing the edge of the sheet through said slot into the groove of the forming-rod, substantially as shown and specified.

5. In a beading-machine, the combination, with a forming-rod having a bearing in the jaws thereof, as described, ot' a standard havin g a. box therein, whereby said rod is held and supported at its extreme end independently of the jaws, and in which it is free to rotate in operating it, substantially as hereinbefore set forth.

CHARLES M. ROHN.

Attest:

F. H. PENFIELD, B. U. CONVERSE. 

